Created attachment 57155 reorder Bresenham error correction to avoid overshoot.
When fbBresSolid draws a line, it can happen that after the last pixel, the Bresenham error term overflows, and fbBresSolid paints another pixel before adjusting the error term. However, if this happens on the last pixel (len=0), this extra pixel might overshoot the boundary, and, in rare cases, lead to a segfault. Fix this issue by adjusting for the Bresenham error term before drawing the main pixel, not after. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/416421 Title: [gm45] X crash on X200s with dual monitors (using DisplayPort) To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/416421/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
